An early read of the materials seized from Osama bin Laden's compound has not yet produced evidence of a specific, imminent terror plot against the U.S., but does show the group continues to have murderous aspirations, according to U.S. officials and to documents obtained by ABC News.

There are thousands of people walking here," John Musto said moments after he arrived at Penn Station from Philadelphia on Friday to celebrate his granddaughter's sixth birthday this weekend. "And it's only been a while [since bin Laden’s death].

They said some evidence was found indicating the al Qaeda leader or his associates had engaged in discussions or planning for a possible attack on a train inside the United States on September 11, 2011.